Human Delusion and Self-Deception

أَمَّنْ هَـٰذَا ٱلَّذِى هُوَ جُندٌ لَّكُمْ يَنصُرُكُم مِّن دُونِ ٱلرَّحْمَـٰنِ ۚ إِنِ ٱلْكَـٰفِرُونَ إِلَّا فِى غُرُورٍ

Or who is it that could be an army for you to aid you other than the Most Merciful? The disbelievers are not but in delusion.